FlashSoft® Software for Windows Server®


FlashSoft® software for Windows Server® increases the performance of enterprise applications such as Microsoft SQL Server® and Microsoft Exchange. It enables the deployment of solid-state devices in the server to increase application performance while increasing storage efficiency.


Accelerate Windows Server Hyper-V Clusters1

FlashSoft software for Windows Server targets Cluster Shared Volumes (CSV). Hyper-V virtual machines hosted on CSV can be accelerated with FlashSoft — with full support for Hyper-V cluster features like LiveMigraton and Failover. FlashSoft supports the use of CSVs when the cache is used in write-through mode. FlashSoft installs as a base Windows Server driver, not inside virtual machines, making it efficient to run and simple to install and manage.

Accelerate Windows Failover Clusters1

FlashSoft software for Windows Server can accelerate applications running in Failover Clusters with shared storage. FlashSoft includes a "Safe Write-through" technology that maintains cache coherence in the case of server Failover by invalidating the parts of the cache that could be impacted by the Failover.

File-level Policy-based Caching for Maximum Caching Efficiency

With FlashSoft an administrator can set a policy to exclude certain files on an accelerated volume for the cache. Especially useful in Hyper-V environments, this policy can deliver the maximum benefits of caching without modifying VM configurations.


FlashSoft software for Windows Server cost-effectively boosts database and application performance on Windows servers, by enabling a solid-state device to function as a cache for frequently accessed data ("hot data") in a server, reducing data access latency and improving storage efficiency.

Performance tests2 illustrate FlashSoft software was able to accelerate the workload from 450 IOPS to 6,462 IOPS – over 14x increase in performance compared to the non-accelerated back end. Storage latency was also greatly improved dropping from 1,272 milliseconds to 55.65 milliseconds – over 22x improvement in response time.


Write-Through and Write-Back caching is available for optimal performance with workloads such as databases and transactional applications.

FlashSoft software can also be deployed as a read-only cache for read-intensive workloads such as Web servers, search and discovery, analytics, and streaming media. Cache data and metadata are maintained entirely on the SSD for persistence in the event of a server crash or system failure, and FlashSoft’s unique metadata model allows full recovery of the cache in milliseconds upon system restart.


FlashSoft caching software runs transparently as a block-level filter driver within the Windows Server operating system. The administrator directs the FlashSoft software to the SSD that it will use as a cache, and identifies the data volumes to be accelerated.

FlashSoft automatically identifies the hot data and begins accelerating applications. FlashSoft for Windows is managed via a plug-in to the Microsoft Management Console (MMC), so administrators can manage FlashSoft functions and operations directly from the GUI, starting and stopping acceleration and monitoring cache performance. PowerShell commandlets provide CLI users and script writers with full access to FlashSoft management features.

Flashsoft software uses any standard SSD attached via PCIe, SAS, SATA or NVMe from any vendor, and it supports all SAN and DAS storage infrastructures.


FlashSoft software uses flash devices installed in the server to minimize latency and reduce I/O between server and storage. Unlike flash deployed in storage systems, FlashSoft delivers the benefits of flash performance to the specific servers and workloads that require acceleration, without requiring modifications to storage infrastructure. As more I/O operations run on the solid-state devices installed in servers, traffic on the storage infrastructure is significantly reduced, increasing the value and the useful lifetime of existing storage investments.

System Requirements

Operating System
Microsoft Windows Server 2008 R2, 2012, 2012 R2 (64-bit)
CSV support is limited to Windows Server 2012 R2
SSD Hardware
FlashSoft software runs on any standard SSD (PCIe, SAS, SATA or NVMe)
Minimum cache size: 16GB
Maximum cache size: 16TB
Server Memory & CPU
Recommended CPU: Dual core or greater, 2GHz or above, 64-bit x86 processor
Memory utilization: 500MB
CPU utilization: 3% - 5%
All server configurations: rack mount, tower, blades or skinless
Storage Supported
Any DAS or SAN storage

The performance benefits of FlashSoft in any specific environment depend on the latency in the current storage infrastructure, the characteristics of the workload and I/O behavior, and other factors including server and network capabilities. To learn more about how FlashSoft can improve application performance in your environment, please consult a SanDisk FlashSoft representative about a free evaluation.

The optimal cache size depends on the amount of data on the disks being accelerated, the applications running on the server, and the peak utilization. Please consult a SanDisk FlashSoft representative to discuss the optimal SSD for your needs.

Case Studies

SanDisk and eDiscovery

Speeding Up the Internet of Things: Crane Merchandising

Plaxo, a Comcast Silicon Valley Innovation Center

Cloud Plus, a Private Cloud Solutions Provider

Middle Tennessee ENT, a Medical Clinic

White Papers

Caching Software Performance Test: Microsoft SQL Server Acceleration with FlashSoft Software 3.8 for Windows Server

EMA Impact Brief: Enhanced FlashSoft Software & Bundles Increase Performance, Lower Storage Costs

Performance Test: FlashSoft® 3.7 for VMware vSphere® 5.5

Data Sheets

Data Sheet: FlashSoft 3.7 for VMware vSphere 5.1 & 5.5

Data Sheet: FlashSoft 3.8 for Windows Server & Windows Server Hyper-V

Data Sheet: FlashSoft 3.8 for Linux

Product Overview: FlashSoft 4.0 for VMware vSphere 6

Analyst Reports

EMA Impact Brief: FlashSoft Software 4.0 Increases Performance, Lowers Storage Costs

VMware and SanDisk Boost Caching with vSphere VAIO API

A Technology Validation by Taneja Group

Total Economic Impact Study by Forrester

Aug 31, 2015 — SanDisk FlashSoft Integrates Data Service for VMware vSphere by Lyle Smith, StorageReview

Aug 31, 2015 — SanDisk Announces FlashSoft 4 Integrated In VMware vSphere by Paul, Alcorn, Tom's IT Pro

Aug 26, 2014 — VMworld 2014 - Storage News Part 1: vSphere APIs for I/O Filters, Storage & Virtualization blog by Cormac Hogan

Aug 26, 2014 — SanDisk VAIO Server-Side Caching on Tech Field Day Extra at VMworld 2014

Jan 30, 2014 — "SanDisk FlashSoft 3.1 vSphere: tests" by Luca Dell'Oca

May 27, 2014 — SanDisk FlashSoft Caching Software Review (Windows) by Brian Beeler, StorageReview

Apr 16, 2014 — Enterprise Storage To Drive SanDisk's First Quarter Performance — Forbes

Jan 27, 2014 — "A closer look at SanDisk FlashSoft 3.1 for vSphere" by Luca Dell'Oca

Five Tips on How to Be Smarter with Your Flash Investment

The Five Myths of Server-Side Caching - Separating Fact From Fiction

Now Available in Bundles!

FlashSoft software is now available in bundles with SanDisk PCIe, SAS, and SATA.


1. CSV support and Windows Filover Clustering support is limited to Write-through (read-only) functionality.

2. Based on internal testing conducted by SanDisk. Full configuration details and measured results available upon request. Performance results may vary according to system architecture, configurations and applications.


Whether you’re a Fortune 500 or five person startup, SanDisk has solutions that will help you get the most out of your infrastructure.


Go ahead, ask us some questions and we'll get back to you with answers.

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